From 245582961bd2e17f41f9df7dd4a828557e290cb7 Mon Sep 17 00:00:00 2001
From: Nathan Mattes <hallo@bullenscheisse.de>
Date: Fri, 17 Mar 2023 10:47:19 +0100
Subject: [PATCH] IOS-123: Open profiles and statuses in app (#981)

---
 Mastodon/Mastodon.entitlements                |  5 ++
 Mastodon/Supporting Files/SceneDelegate.swift | 82 ++++++++++++++-----
 2 files changed, 68 insertions(+), 19 deletions(-)

diff --git a/Mastodon/Mastodon.entitlements b/Mastodon/Mastodon.entitlements
index 153b958a3..f2ab4df87 100644
--- a/Mastodon/Mastodon.entitlements
+++ b/Mastodon/Mastodon.entitlements
@@ -4,6 +4,11 @@
 <dict>
 	<key>aps-environment</key>
 	<string>development</string>
+	<key>com.apple.developer.associated-domains</key>
+	<array>
+		<string>applinks:mastodon.social</string>
+		<string>applinks:mastodon.online</string>
+	</array>
 	<key>com.apple.developer.siri</key>
 	<true/>
 	<key>com.apple.security.application-groups</key>
diff --git a/Mastodon/Supporting Files/SceneDelegate.swift b/Mastodon/Supporting Files/SceneDelegate.swift
index 44501a1dd..a5c3a9caa 100644
--- a/Mastodon/Supporting Files/SceneDelegate.swift	
+++ b/Mastodon/Supporting Files/SceneDelegate.swift	
@@ -71,6 +71,10 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         if let urlContext = connectionOptions.urlContexts.first {
             handleUrl(context: urlContext)
         }
+
+        if let userActivity = connectionOptions.userActivities.first {
+            handleUniversalLink(userActivity: userActivity)
+        }
         
         #if SNAPSHOT
         // speedup animation
@@ -104,13 +108,6 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         #endif
     }
 
-    func sceneDidDisconnect(_ scene: UIScene) {
-        // Called as the scene is being released by the system.
-        // This occurs shortly after the scene enters the background, or when its session is discarded.
-        // Release any resources associated with this scene that can be re-created the next time the scene connects.
-        // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead).
-    }
-
     func sceneDidBecomeActive(_ scene: UIScene) {
         // Called when the scene has moved from an inactive state to an active state.
         // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
@@ -135,22 +132,68 @@ class SceneDelegate: UIResponder, UIWindowSceneDelegate {
         }
     }
 
-    func sceneWillResignActive(_ scene: UIScene) {
-        // Called when the scene will move from an active state to an inactive state.
-        // This may occur due to temporary interruptions (ex. an incoming phone call).
+    func scene(_ scene: UIScene, continue userActivity: NSUserActivity) {
+        handleUniversalLink(userActivity: userActivity)
     }
 
-    func sceneWillEnterForeground(_ scene: UIScene) {
-        // Called as the scene transitions from the background to the foreground.
-        // Use this method to undo the changes made on entering the background.
-    }
+    private func handleUniversalLink(userActivity: NSUserActivity) {
+        guard userActivity.activityType == NSUserActivityTypeBrowsingWeb,
+              let incomingURL = userActivity.webpageURL,
+              let components = NSURLComponents(url: incomingURL, resolvingAgainstBaseURL: true) else {
+            return
+        }
 
-    func sceneDidEnterBackground(_ scene: UIScene) {
-        // Called as the scene transitions from the foreground to the background.
-        // Use this method to save data, release shared resources, and store enough scene-specific state information
-        // to restore the scene back to its current state.
-    }
+        guard let path = components.path, let authContext = coordinator?.authContext else {
+            return
+        }
 
+        let pathElements = path.split(separator: "/")
+
+        let profile: String?
+        if let profileInPath = pathElements[safe: 0] {
+            profile = String(profileInPath)
+        } else {
+            profile = nil
+        }
+
+        let statusID: String?
+        if let statusIDInPath = pathElements[safe: 1] {
+            statusID = String(statusIDInPath)
+        } else {
+            statusID = nil
+        }
+
+        switch (profile, statusID) {
+            case (profile, nil):
+                let profileViewModel = RemoteProfileViewModel(
+                    context: AppContext.shared,
+                    authContext: authContext,
+                    acct: incomingURL.absoluteString
+                )
+                self.coordinator?.present(
+                    scene: .profile(viewModel: profileViewModel),
+                    from: nil,
+                    transition: .show
+                )
+
+            case (profile, statusID):
+                Task {
+                    guard let statusOnMyInstance = try await AppContext.shared.apiService.search(query: .init(q: incomingURL.absoluteString, resolve: true), authenticationBox: authContext.mastodonAuthenticationBox).value.statuses.first else { return }
+
+                    let threadViewModel = RemoteThreadViewModel(
+                        context: AppContext.shared,
+                        authContext: authContext,
+                        statusID: statusOnMyInstance.id
+                    )
+                    coordinator?.present(scene: .thread(viewModel: threadViewModel), from: nil, transition: .show)
+                }
+
+            case (_, _):
+                break
+                // do nothing
+        }
+
+    }
 }
 
 extension SceneDelegate {
@@ -298,3 +341,4 @@ extension SceneDelegate {
         }
     }
 }
+